1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCTargetAsmParser.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/ADT/SmallVector.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/ADT/Twine.h"
40 class ARMAsmParser : public MCTargetAsmParser {
44 MCAsmParser &getParser() const { return Parser; }
45 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
47 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
48 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
50 int tryParseRegister();
51 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
52 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
53 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
56 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
57 const MCExpr *applyPrefixToExpr(const MCExpr *E,
58 MCSymbolRefExpr::VariantKind Variant);
61 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
62 unsigned &ShiftAmount);
63 bool parseDirectiveWord(unsigned Size, SMLoc L);
64 bool parseDirectiveThumb(SMLoc L);
65 bool parseDirectiveThumbFunc(SMLoc L);
66 bool parseDirectiveCode(SMLoc L);
67 bool parseDirectiveSyntax(SMLoc L);
69 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
70 bool &CarrySetting, unsigned &ProcessorIMod);
71 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
72 bool &CanAcceptPredicationCode);
74 bool isThumb() const {
75 // FIXME: Can tablegen auto-generate this?
76 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
78 bool isThumbOne() const {
79 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
82 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
83 setAvailableFeatures(FB);
86 /// @name Auto-generated Match Functions
89 #define GET_ASSEMBLER_HEADER
90 #include "ARMGenAsmMatcher.inc"
94 OperandMatchResultTy parseCoprocNumOperand(
95 SmallVectorImpl<MCParsedAsmOperand*>&);
96 OperandMatchResultTy parseCoprocRegOperand(
97 SmallVectorImpl<MCParsedAsmOperand*>&);
98 OperandMatchResultTy parseMemBarrierOptOperand(
99 SmallVectorImpl<MCParsedAsmOperand*>&);
100 OperandMatchResultTy parseProcIFlagsOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseMSRMaskOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
105 StringRef Op, int Low, int High);
106 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
107 return parsePKHImm(O, "lsl", 0, 31);
109 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
110 return parsePKHImm(O, "asr", 1, 32);
112 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
114 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
116 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
118 // Asm Match Converter Methods
119 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
120 const SmallVectorImpl<MCParsedAsmOperand*> &);
121 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
122 const SmallVectorImpl<MCParsedAsmOperand*> &);
123 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
124 const SmallVectorImpl<MCParsedAsmOperand*> &);
125 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
126 const SmallVectorImpl<MCParsedAsmOperand*> &);
127 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
128 const SmallVectorImpl<MCParsedAsmOperand*> &);
129 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
130 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool validateInstruction(MCInst &Inst,
133 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
136 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
137 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
138 MCAsmParserExtension::Initialize(_Parser);
140 // Initialize the set of available features.
141 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
144 // Implementation of the MCTargetAsmParser interface:
145 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
146 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
147 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
148 bool ParseDirective(AsmToken DirectiveID);
150 bool MatchAndEmitInstruction(SMLoc IDLoc,
151 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
154 } // end anonymous namespace
158 /// ARMOperand - Instances of this class represent a parsed ARM machine
160 class ARMOperand : public MCParsedAsmOperand {
184 SMLoc StartLoc, EndLoc;
185 SmallVector<unsigned, 8> Registers;
189 ARMCC::CondCodes Val;
201 ARM_PROC::IFlags Val;
221 /// Combined record for all forms of ARM address expressions.
224 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
226 const MCConstantExpr *OffsetImm; // Offset immediate value
227 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
228 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
229 unsigned ShiftValue; // shift for OffsetReg.
230 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
243 ARM_AM::ShiftOpc ShiftTy;
249 ARM_AM::ShiftOpc ShiftTy;
262 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
264 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
266 StartLoc = o.StartLoc;
280 case DPRRegisterList:
281 case SPRRegisterList:
282 Registers = o.Registers;
297 case PostIndexRegister:
298 PostIdxReg = o.PostIdxReg;
306 case ShifterImmediate:
307 ShifterImm = o.ShifterImm;
309 case ShiftedRegister:
310 RegShiftedReg = o.RegShiftedReg;
312 case ShiftedImmediate:
313 RegShiftedImm = o.RegShiftedImm;
315 case RotateImmediate:
318 case BitfieldDescriptor:
319 Bitfield = o.Bitfield;
324 /// getStartLoc - Get the location of the first token of this operand.
325 SMLoc getStartLoc() const { return StartLoc; }
326 /// getEndLoc - Get the location of the last token of this operand.
327 SMLoc getEndLoc() const { return EndLoc; }
329 ARMCC::CondCodes getCondCode() const {
330 assert(Kind == CondCode && "Invalid access!");
334 unsigned getCoproc() const {
335 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
339 StringRef getToken() const {
340 assert(Kind == Token && "Invalid access!");
341 return StringRef(Tok.Data, Tok.Length);
344 unsigned getReg() const {
345 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
349 const SmallVectorImpl<unsigned> &getRegList() const {
350 assert((Kind == RegisterList || Kind == DPRRegisterList ||
351 Kind == SPRRegisterList) && "Invalid access!");
355 const MCExpr *getImm() const {
356 assert(Kind == Immediate && "Invalid access!");
360 ARM_MB::MemBOpt getMemBarrierOpt() const {
361 assert(Kind == MemBarrierOpt && "Invalid access!");
365 ARM_PROC::IFlags getProcIFlags() const {
366 assert(Kind == ProcIFlags && "Invalid access!");
370 unsigned getMSRMask() const {
371 assert(Kind == MSRMask && "Invalid access!");
375 bool isCoprocNum() const { return Kind == CoprocNum; }
376 bool isCoprocReg() const { return Kind == CoprocReg; }
377 bool isCondCode() const { return Kind == CondCode; }
378 bool isCCOut() const { return Kind == CCOut; }
379 bool isImm() const { return Kind == Immediate; }
380 bool isImm0_255() const {
381 if (Kind != Immediate)
383 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
384 if (!CE) return false;
385 int64_t Value = CE->getValue();
386 return Value >= 0 && Value < 256;
388 bool isImm0_7() const {
389 if (Kind != Immediate)
391 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
392 if (!CE) return false;
393 int64_t Value = CE->getValue();
394 return Value >= 0 && Value < 8;
396 bool isImm0_15() const {
397 if (Kind != Immediate)
399 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
400 if (!CE) return false;
401 int64_t Value = CE->getValue();
402 return Value >= 0 && Value < 16;
404 bool isImm0_31() const {
405 if (Kind != Immediate)
407 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
408 if (!CE) return false;
409 int64_t Value = CE->getValue();
410 return Value >= 0 && Value < 32;
412 bool isImm1_16() const {
413 if (Kind != Immediate)
415 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
416 if (!CE) return false;
417 int64_t Value = CE->getValue();
418 return Value > 0 && Value < 17;
420 bool isImm1_32() const {
421 if (Kind != Immediate)
423 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
424 if (!CE) return false;
425 int64_t Value = CE->getValue();
426 return Value > 0 && Value < 33;
428 bool isImm0_65535() const {
429 if (Kind != Immediate)
431 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
432 if (!CE) return false;
433 int64_t Value = CE->getValue();
434 return Value >= 0 && Value < 65536;
436 bool isImm0_65535Expr() const {
437 if (Kind != Immediate)
439 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
440 // If it's not a constant expression, it'll generate a fixup and be
442 if (!CE) return true;
443 int64_t Value = CE->getValue();
444 return Value >= 0 && Value < 65536;
446 bool isImm24bit() const {
447 if (Kind != Immediate)
449 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
450 if (!CE) return false;
451 int64_t Value = CE->getValue();
452 return Value >= 0 && Value <= 0xffffff;
454 bool isPKHLSLImm() const {
455 if (Kind != Immediate)
457 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
458 if (!CE) return false;
459 int64_t Value = CE->getValue();
460 return Value >= 0 && Value < 32;
462 bool isPKHASRImm() const {
463 if (Kind != Immediate)
465 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
466 if (!CE) return false;
467 int64_t Value = CE->getValue();
468 return Value > 0 && Value <= 32;
470 bool isARMSOImm() const {
471 if (Kind != Immediate)
473 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
474 if (!CE) return false;
475 int64_t Value = CE->getValue();
476 return ARM_AM::getSOImmVal(Value) != -1;
478 bool isT2SOImm() const {
479 if (Kind != Immediate)
481 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
482 if (!CE) return false;
483 int64_t Value = CE->getValue();
484 return ARM_AM::getT2SOImmVal(Value) != -1;
486 bool isSetEndImm() const {
487 if (Kind != Immediate)
489 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
490 if (!CE) return false;
491 int64_t Value = CE->getValue();
492 return Value == 1 || Value == 0;
494 bool isReg() const { return Kind == Register; }
495 bool isRegList() const { return Kind == RegisterList; }
496 bool isDPRRegList() const { return Kind == DPRRegisterList; }
497 bool isSPRRegList() const { return Kind == SPRRegisterList; }
498 bool isToken() const { return Kind == Token; }
499 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
500 bool isMemory() const { return Kind == Memory; }
501 bool isPostIdxReg() const { return Kind == PostIndexRegister; }
502 bool isShifterImm() const { return Kind == ShifterImmediate; }
503 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
504 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
505 bool isRotImm() const { return Kind == RotateImmediate; }
506 bool isBitfield() const { return Kind == BitfieldDescriptor; }
507 bool isMemNoOffset() const {
510 // No offset of any kind.
511 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
513 bool isAddrMode2() const {
516 // Check for register offset.
517 if (Mem.OffsetRegNum) return true;
518 // Immediate offset in range [-4095, 4095].
519 if (!Mem.OffsetImm) return true;
520 int64_t Val = Mem.OffsetImm->getValue();
521 return Val > -4096 && Val < 4096;
523 bool isAM2OffsetImm() const {
524 if (Kind != Immediate)
526 // Immediate offset in range [-4095, 4095].
527 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
528 if (!CE) return false;
529 int64_t Val = CE->getValue();
530 return Val > -4096 && Val < 4096;
532 bool isAddrMode5() const {
535 // Check for register offset.
536 if (Mem.OffsetRegNum) return false;
537 // Immediate offset in range [-1020, 1020] and a multiple of 4.
538 if (!Mem.OffsetImm) return true;
539 int64_t Val = Mem.OffsetImm->getValue();
540 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
542 bool isMemRegOffset() const {
543 if (Kind != Memory || !Mem.OffsetRegNum)
547 bool isMemThumbRR() const {
548 // Thumb reg+reg addressing is simple. Just two registers, a base and
549 // an offset. No shifts, negations or any other complicating factors.
550 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
551 Mem.ShiftType != ARM_AM::no_shift)
555 bool isMemImm8Offset() const {
556 if (Kind != Memory || Mem.OffsetRegNum != 0)
558 // Immediate offset in range [-255, 255].
559 if (!Mem.OffsetImm) return true;
560 int64_t Val = Mem.OffsetImm->getValue();
561 return Val > -256 && Val < 256;
563 bool isMemImm12Offset() const {
564 if (Kind != Memory || Mem.OffsetRegNum != 0)
566 // Immediate offset in range [-4095, 4095].
567 if (!Mem.OffsetImm) return true;
568 int64_t Val = Mem.OffsetImm->getValue();
569 return Val > -4096 && Val < 4096;
571 bool isPostIdxImm8() const {
572 if (Kind != Immediate)
574 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
575 if (!CE) return false;
576 int64_t Val = CE->getValue();
577 return Val > -256 && Val < 256;
580 bool isMSRMask() const { return Kind == MSRMask; }
581 bool isProcIFlags() const { return Kind == ProcIFlags; }
583 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
584 // Add as immediates when possible. Null MCExpr = 0.
586 Inst.addOperand(MCOperand::CreateImm(0));
587 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
588 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
590 Inst.addOperand(MCOperand::CreateExpr(Expr));
593 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
594 assert(N == 2 && "Invalid number of operands!");
595 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
596 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
597 Inst.addOperand(MCOperand::CreateReg(RegNum));
600 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
601 assert(N == 1 && "Invalid number of operands!");
602 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
605 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
606 assert(N == 1 && "Invalid number of operands!");
607 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
610 void addCCOutOperands(MCInst &Inst, unsigned N) const {
611 assert(N == 1 && "Invalid number of operands!");
612 Inst.addOperand(MCOperand::CreateReg(getReg()));
615 void addRegOperands(MCInst &Inst, unsigned N) const {
616 assert(N == 1 && "Invalid number of operands!");
617 Inst.addOperand(MCOperand::CreateReg(getReg()));
620 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
621 assert(N == 3 && "Invalid number of operands!");
622 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
623 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
624 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
625 Inst.addOperand(MCOperand::CreateImm(
626 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
629 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
630 assert(N == 2 && "Invalid number of operands!");
631 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
632 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
633 Inst.addOperand(MCOperand::CreateImm(
634 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
638 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
639 assert(N == 1 && "Invalid number of operands!");
640 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
644 void addRegListOperands(MCInst &Inst, unsigned N) const {
645 assert(N == 1 && "Invalid number of operands!");
646 const SmallVectorImpl<unsigned> &RegList = getRegList();
647 for (SmallVectorImpl<unsigned>::const_iterator
648 I = RegList.begin(), E = RegList.end(); I != E; ++I)
649 Inst.addOperand(MCOperand::CreateReg(*I));
652 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
653 addRegListOperands(Inst, N);
656 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
657 addRegListOperands(Inst, N);
660 void addRotImmOperands(MCInst &Inst, unsigned N) const {
661 assert(N == 1 && "Invalid number of operands!");
662 // Encoded as val>>3. The printer handles display as 8, 16, 24.
663 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
666 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
667 assert(N == 1 && "Invalid number of operands!");
668 // Munge the lsb/width into a bitfield mask.
669 unsigned lsb = Bitfield.LSB;
670 unsigned width = Bitfield.Width;
671 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
672 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
673 (32 - (lsb + width)));
674 Inst.addOperand(MCOperand::CreateImm(Mask));
677 void addImmOperands(MCInst &Inst, unsigned N) const {
678 assert(N == 1 && "Invalid number of operands!");
679 addExpr(Inst, getImm());
682 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
683 assert(N == 1 && "Invalid number of operands!");
684 addExpr(Inst, getImm());
687 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
688 assert(N == 1 && "Invalid number of operands!");
689 addExpr(Inst, getImm());
692 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
693 assert(N == 1 && "Invalid number of operands!");
694 addExpr(Inst, getImm());
697 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
698 assert(N == 1 && "Invalid number of operands!");
699 addExpr(Inst, getImm());
702 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
703 assert(N == 1 && "Invalid number of operands!");
704 // The constant encodes as the immediate-1, and we store in the instruction
705 // the bits as encoded, so subtract off one here.
706 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
707 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
710 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
711 assert(N == 1 && "Invalid number of operands!");
712 // The constant encodes as the immediate-1, and we store in the instruction
713 // the bits as encoded, so subtract off one here.
714 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
715 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
718 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
719 assert(N == 1 && "Invalid number of operands!");
720 addExpr(Inst, getImm());
723 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
724 assert(N == 1 && "Invalid number of operands!");
725 addExpr(Inst, getImm());
728 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
729 assert(N == 1 && "Invalid number of operands!");
730 addExpr(Inst, getImm());
733 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
734 assert(N == 1 && "Invalid number of operands!");
735 addExpr(Inst, getImm());
738 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
739 assert(N == 1 && "Invalid number of operands!");
740 // An ASR value of 32 encodes as 0, so that's how we want to add it to
741 // the instruction as well.
742 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
743 int Val = CE->getValue();
744 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
747 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
748 assert(N == 1 && "Invalid number of operands!");
749 addExpr(Inst, getImm());
752 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
753 assert(N == 1 && "Invalid number of operands!");
754 addExpr(Inst, getImm());
757 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
758 assert(N == 1 && "Invalid number of operands!");
759 addExpr(Inst, getImm());
762 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
763 assert(N == 1 && "Invalid number of operands!");
764 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
767 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
768 assert(N == 1 && "Invalid number of operands!");
769 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
772 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
773 assert(N == 3 && "Invalid number of operands!");
774 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
775 if (!Mem.OffsetRegNum) {
776 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
777 // Special case for #-0
778 if (Val == INT32_MIN) Val = 0;
779 if (Val < 0) Val = -Val;
780 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
782 // For register offset, we encode the shift type and negation flag
784 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
787 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
788 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
789 Inst.addOperand(MCOperand::CreateImm(Val));
792 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
793 assert(N == 2 && "Invalid number of operands!");
794 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
795 assert(CE && "non-constant AM2OffsetImm operand!");
796 int32_t Val = CE->getValue();
797 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
798 // Special case for #-0
799 if (Val == INT32_MIN) Val = 0;
800 if (Val < 0) Val = -Val;
801 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
802 Inst.addOperand(MCOperand::CreateReg(0));
803 Inst.addOperand(MCOperand::CreateImm(Val));
806 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
807 assert(N == 2 && "Invalid number of operands!");
808 // The lower two bits are always zero and as such are not encoded.
809 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
810 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
811 // Special case for #-0
812 if (Val == INT32_MIN) Val = 0;
813 if (Val < 0) Val = -Val;
814 Val = ARM_AM::getAM5Opc(AddSub, Val);
815 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
816 Inst.addOperand(MCOperand::CreateImm(Val));
819 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
820 assert(N == 2 && "Invalid number of operands!");
821 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
822 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
823 Inst.addOperand(MCOperand::CreateImm(Val));
826 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
827 assert(N == 2 && "Invalid number of operands!");
828 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
829 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
830 Inst.addOperand(MCOperand::CreateImm(Val));
833 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
834 assert(N == 3 && "Invalid number of operands!");
835 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
836 Mem.ShiftValue, Mem.ShiftType);
837 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
838 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
839 Inst.addOperand(MCOperand::CreateImm(Val));
842 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
843 assert(N == 2 && "Invalid number of operands!");
844 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
845 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
848 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
849 assert(N == 1 && "Invalid number of operands!");
850 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
851 assert(CE && "non-constant post-idx-imm8 operand!");
852 int Imm = CE->getValue();
853 bool isAdd = Imm >= 0;
854 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
855 Inst.addOperand(MCOperand::CreateImm(Imm));
858 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
859 assert(N == 2 && "Invalid number of operands!");
860 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
861 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.Imm));
864 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
865 assert(N == 1 && "Invalid number of operands!");
866 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
869 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
870 assert(N == 1 && "Invalid number of operands!");
871 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
874 virtual void print(raw_ostream &OS) const;
876 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
877 ARMOperand *Op = new ARMOperand(CondCode);
884 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
885 ARMOperand *Op = new ARMOperand(CoprocNum);
886 Op->Cop.Val = CopVal;
892 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
893 ARMOperand *Op = new ARMOperand(CoprocReg);
894 Op->Cop.Val = CopVal;
900 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
901 ARMOperand *Op = new ARMOperand(CCOut);
902 Op->Reg.RegNum = RegNum;
908 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
909 ARMOperand *Op = new ARMOperand(Token);
910 Op->Tok.Data = Str.data();
911 Op->Tok.Length = Str.size();
917 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
918 ARMOperand *Op = new ARMOperand(Register);
919 Op->Reg.RegNum = RegNum;
925 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
930 ARMOperand *Op = new ARMOperand(ShiftedRegister);
931 Op->RegShiftedReg.ShiftTy = ShTy;
932 Op->RegShiftedReg.SrcReg = SrcReg;
933 Op->RegShiftedReg.ShiftReg = ShiftReg;
934 Op->RegShiftedReg.ShiftImm = ShiftImm;
940 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
944 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
945 Op->RegShiftedImm.ShiftTy = ShTy;
946 Op->RegShiftedImm.SrcReg = SrcReg;
947 Op->RegShiftedImm.ShiftImm = ShiftImm;
953 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
955 ARMOperand *Op = new ARMOperand(ShifterImmediate);
956 Op->ShifterImm.isASR = isASR;
957 Op->ShifterImm.Imm = Imm;
963 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
964 ARMOperand *Op = new ARMOperand(RotateImmediate);
965 Op->RotImm.Imm = Imm;
971 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
973 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
974 Op->Bitfield.LSB = LSB;
975 Op->Bitfield.Width = Width;
982 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
983 SMLoc StartLoc, SMLoc EndLoc) {
984 KindTy Kind = RegisterList;
986 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
987 contains(Regs.front().first))
988 Kind = DPRRegisterList;
989 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
990 contains(Regs.front().first))
991 Kind = SPRRegisterList;
993 ARMOperand *Op = new ARMOperand(Kind);
994 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
995 I = Regs.begin(), E = Regs.end(); I != E; ++I)
996 Op->Registers.push_back(I->first);
997 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
998 Op->StartLoc = StartLoc;
1003 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1004 ARMOperand *Op = new ARMOperand(Immediate);
1011 static ARMOperand *CreateMem(unsigned BaseRegNum,
1012 const MCConstantExpr *OffsetImm,
1013 unsigned OffsetRegNum,
1014 ARM_AM::ShiftOpc ShiftType,
1015 unsigned ShiftValue,
1018 ARMOperand *Op = new ARMOperand(Memory);
1019 Op->Mem.BaseRegNum = BaseRegNum;
1020 Op->Mem.OffsetImm = OffsetImm;
1021 Op->Mem.OffsetRegNum = OffsetRegNum;
1022 Op->Mem.ShiftType = ShiftType;
1023 Op->Mem.ShiftValue = ShiftValue;
1024 Op->Mem.isNegative = isNegative;
1030 static ARMOperand *CreatePostIdxReg(unsigned RegNum, unsigned Imm,
1032 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1033 Op->PostIdxReg.RegNum = RegNum;
1034 Op->PostIdxReg.Imm = Imm;
1040 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1041 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1042 Op->MBOpt.Val = Opt;
1048 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1049 ARMOperand *Op = new ARMOperand(ProcIFlags);
1050 Op->IFlags.Val = IFlags;
1056 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1057 ARMOperand *Op = new ARMOperand(MSRMask);
1058 Op->MMask.Val = MMask;
1065 } // end anonymous namespace.
1067 void ARMOperand::print(raw_ostream &OS) const {
1070 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1073 OS << "<ccout " << getReg() << ">";
1076 OS << "<coprocessor number: " << getCoproc() << ">";
1079 OS << "<coprocessor register: " << getCoproc() << ">";
1082 OS << "<mask: " << getMSRMask() << ">";
1085 getImm()->print(OS);
1088 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1092 << " base:" << Mem.BaseRegNum;
1095 case PostIndexRegister:
1096 OS << "post-idx register " << (PostIdxReg.Imm ? "" : "-")
1097 << PostIdxReg.RegNum
1101 OS << "<ARM_PROC::";
1102 unsigned IFlags = getProcIFlags();
1103 for (int i=2; i >= 0; --i)
1104 if (IFlags & (1 << i))
1105 OS << ARM_PROC::IFlagsToString(1 << i);
1110 OS << "<register " << getReg() << ">";
1112 case ShifterImmediate:
1113 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1114 << " #" << ShifterImm.Imm << ">";
1116 case ShiftedRegister:
1117 OS << "<so_reg_reg "
1118 << RegShiftedReg.SrcReg
1119 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1120 << ", " << RegShiftedReg.ShiftReg << ", "
1121 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1124 case ShiftedImmediate:
1125 OS << "<so_reg_imm "
1126 << RegShiftedImm.SrcReg
1127 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1128 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1131 case RotateImmediate:
1132 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1134 case BitfieldDescriptor:
1135 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1136 << ", width: " << Bitfield.Width << ">";
1139 case DPRRegisterList:
1140 case SPRRegisterList: {
1141 OS << "<register_list ";
1143 const SmallVectorImpl<unsigned> &RegList = getRegList();
1144 for (SmallVectorImpl<unsigned>::const_iterator
1145 I = RegList.begin(), E = RegList.end(); I != E; ) {
1147 if (++I < E) OS << ", ";
1154 OS << "'" << getToken() << "'";
1159 /// @name Auto-generated Match Functions
1162 static unsigned MatchRegisterName(StringRef Name);
1166 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1167 SMLoc &StartLoc, SMLoc &EndLoc) {
1168 RegNo = tryParseRegister();
1170 return (RegNo == (unsigned)-1);
1173 /// Try to parse a register name. The token must be an Identifier when called,
1174 /// and if it is a register name the token is eaten and the register number is
1175 /// returned. Otherwise return -1.
1177 int ARMAsmParser::tryParseRegister() {
1178 const AsmToken &Tok = Parser.getTok();
1179 if (Tok.isNot(AsmToken::Identifier)) return -1;
1181 // FIXME: Validate register for the current architecture; we have to do
1182 // validation later, so maybe there is no need for this here.
1183 std::string upperCase = Tok.getString().str();
1184 std::string lowerCase = LowercaseString(upperCase);
1185 unsigned RegNum = MatchRegisterName(lowerCase);
1187 RegNum = StringSwitch<unsigned>(lowerCase)
1188 .Case("r13", ARM::SP)
1189 .Case("r14", ARM::LR)
1190 .Case("r15", ARM::PC)
1191 .Case("ip", ARM::R12)
1194 if (!RegNum) return -1;
1196 Parser.Lex(); // Eat identifier token.
1200 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1201 // If a recoverable error occurs, return 1. If an irrecoverable error
1202 // occurs, return -1. An irrecoverable error is one where tokens have been
1203 // consumed in the process of trying to parse the shifter (i.e., when it is
1204 // indeed a shifter operand, but malformed).
1205 int ARMAsmParser::tryParseShiftRegister(
1206 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1207 SMLoc S = Parser.getTok().getLoc();
1208 const AsmToken &Tok = Parser.getTok();
1209 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1211 std::string upperCase = Tok.getString().str();
1212 std::string lowerCase = LowercaseString(upperCase);
1213 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1214 .Case("lsl", ARM_AM::lsl)
1215 .Case("lsr", ARM_AM::lsr)
1216 .Case("asr", ARM_AM::asr)
1217 .Case("ror", ARM_AM::ror)
1218 .Case("rrx", ARM_AM::rrx)
1219 .Default(ARM_AM::no_shift);
1221 if (ShiftTy == ARM_AM::no_shift)
1224 Parser.Lex(); // Eat the operator.
1226 // The source register for the shift has already been added to the
1227 // operand list, so we need to pop it off and combine it into the shifted
1228 // register operand instead.
1229 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1230 if (!PrevOp->isReg())
1231 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1232 int SrcReg = PrevOp->getReg();
1235 if (ShiftTy == ARM_AM::rrx) {
1236 // RRX Doesn't have an explicit shift amount. The encoder expects
1237 // the shift register to be the same as the source register. Seems odd,
1241 // Figure out if this is shifted by a constant or a register (for non-RRX).
1242 if (Parser.getTok().is(AsmToken::Hash)) {
1243 Parser.Lex(); // Eat hash.
1244 SMLoc ImmLoc = Parser.getTok().getLoc();
1245 const MCExpr *ShiftExpr = 0;
1246 if (getParser().ParseExpression(ShiftExpr)) {
1247 Error(ImmLoc, "invalid immediate shift value");
1250 // The expression must be evaluatable as an immediate.
1251 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1253 Error(ImmLoc, "invalid immediate shift value");
1256 // Range check the immediate.
1257 // lsl, ror: 0 <= imm <= 31
1258 // lsr, asr: 0 <= imm <= 32
1259 Imm = CE->getValue();
1261 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1262 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1263 Error(ImmLoc, "immediate shift value out of range");
1266 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1267 ShiftReg = tryParseRegister();
1268 SMLoc L = Parser.getTok().getLoc();
1269 if (ShiftReg == -1) {
1270 Error (L, "expected immediate or register in shift operand");
1274 Error (Parser.getTok().getLoc(),
1275 "expected immediate or register in shift operand");
1280 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1281 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1283 S, Parser.getTok().getLoc()));
1285 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1286 S, Parser.getTok().getLoc()));
1292 /// Try to parse a register name. The token must be an Identifier when called.
1293 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1294 /// if there is a "writeback". 'true' if it's not a register.
1296 /// TODO this is likely to change to allow different register types and or to
1297 /// parse for a specific register type.
1299 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1300 SMLoc S = Parser.getTok().getLoc();
1301 int RegNo = tryParseRegister();
1305 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1307 const AsmToken &ExclaimTok = Parser.getTok();
1308 if (ExclaimTok.is(AsmToken::Exclaim)) {
1309 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1310 ExclaimTok.getLoc()));
1311 Parser.Lex(); // Eat exclaim token
1317 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1318 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1320 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1321 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1323 switch (Name.size()) {
1326 if (Name[0] != CoprocOp)
1343 if (Name[0] != CoprocOp || Name[1] != '1')
1347 case '0': return 10;
1348 case '1': return 11;
1349 case '2': return 12;
1350 case '3': return 13;
1351 case '4': return 14;
1352 case '5': return 15;
1360 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1361 /// token must be an Identifier when called, and if it is a coprocessor
1362 /// number, the token is eaten and the operand is added to the operand list.
1363 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1364 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1365 SMLoc S = Parser.getTok().getLoc();
1366 const AsmToken &Tok = Parser.getTok();
1367 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1369 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1371 return MatchOperand_NoMatch;
1373 Parser.Lex(); // Eat identifier token.
1374 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1375 return MatchOperand_Success;
1378 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1379 /// token must be an Identifier when called, and if it is a coprocessor
1380 /// number, the token is eaten and the operand is added to the operand list.
1381 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1382 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1383 SMLoc S = Parser.getTok().getLoc();
1384 const AsmToken &Tok = Parser.getTok();
1385 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1387 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1389 return MatchOperand_NoMatch;
1391 Parser.Lex(); // Eat identifier token.
1392 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1393 return MatchOperand_Success;
1396 /// Parse a register list, return it if successful else return null. The first
1397 /// token must be a '{' when called.
1399 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1400 assert(Parser.getTok().is(AsmToken::LCurly) &&
1401 "Token is not a Left Curly Brace");
1402 SMLoc S = Parser.getTok().getLoc();
1404 // Read the rest of the registers in the list.
1405 unsigned PrevRegNum = 0;
1406 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1409 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1410 Parser.Lex(); // Eat non-identifier token.
1412 const AsmToken &RegTok = Parser.getTok();
1413 SMLoc RegLoc = RegTok.getLoc();
1414 if (RegTok.isNot(AsmToken::Identifier)) {
1415 Error(RegLoc, "register expected");
1419 int RegNum = tryParseRegister();
1421 Error(RegLoc, "register expected");
1426 int Reg = PrevRegNum;
1429 Registers.push_back(std::make_pair(Reg, RegLoc));
1430 } while (Reg != RegNum);
1432 Registers.push_back(std::make_pair(RegNum, RegLoc));
1435 PrevRegNum = RegNum;
1436 } while (Parser.getTok().is(AsmToken::Comma) ||
1437 Parser.getTok().is(AsmToken::Minus));
1439 // Process the right curly brace of the list.
1440 const AsmToken &RCurlyTok = Parser.getTok();
1441 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1442 Error(RCurlyTok.getLoc(), "'}' expected");
1446 SMLoc E = RCurlyTok.getLoc();
1447 Parser.Lex(); // Eat right curly brace token.
1449 // Verify the register list.
1450 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1451 RI = Registers.begin(), RE = Registers.end();
1453 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1454 bool EmittedWarning = false;
1456 DenseMap<unsigned, bool> RegMap;
1457 RegMap[HighRegNum] = true;
1459 for (++RI; RI != RE; ++RI) {
1460 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1461 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1464 Error(RegInfo.second, "register duplicated in register list");
1468 if (!EmittedWarning && Reg < HighRegNum)
1469 Warning(RegInfo.second,
1470 "register not in ascending order in register list");
1473 HighRegNum = std::max(Reg, HighRegNum);
1476 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1480 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1481 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1482 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1483 SMLoc S = Parser.getTok().getLoc();
1484 const AsmToken &Tok = Parser.getTok();
1485 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1486 StringRef OptStr = Tok.getString();
1488 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1489 .Case("sy", ARM_MB::SY)
1490 .Case("st", ARM_MB::ST)
1491 .Case("sh", ARM_MB::ISH)
1492 .Case("ish", ARM_MB::ISH)
1493 .Case("shst", ARM_MB::ISHST)
1494 .Case("ishst", ARM_MB::ISHST)
1495 .Case("nsh", ARM_MB::NSH)
1496 .Case("un", ARM_MB::NSH)
1497 .Case("nshst", ARM_MB::NSHST)
1498 .Case("unst", ARM_MB::NSHST)
1499 .Case("osh", ARM_MB::OSH)
1500 .Case("oshst", ARM_MB::OSHST)
1504 return MatchOperand_NoMatch;
1506 Parser.Lex(); // Eat identifier token.
1507 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1508 return MatchOperand_Success;
1511 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1512 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1513 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1514 SMLoc S = Parser.getTok().getLoc();
1515 const AsmToken &Tok = Parser.getTok();
1516 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1517 StringRef IFlagsStr = Tok.getString();
1519 unsigned IFlags = 0;
1520 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1521 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1522 .Case("a", ARM_PROC::A)
1523 .Case("i", ARM_PROC::I)
1524 .Case("f", ARM_PROC::F)
1527 // If some specific iflag is already set, it means that some letter is
1528 // present more than once, this is not acceptable.
1529 if (Flag == ~0U || (IFlags & Flag))
1530 return MatchOperand_NoMatch;
1535 Parser.Lex(); // Eat identifier token.
1536 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1537 return MatchOperand_Success;
1540 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1541 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1542 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1543 SMLoc S = Parser.getTok().getLoc();
1544 const AsmToken &Tok = Parser.getTok();
1545 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1546 StringRef Mask = Tok.getString();
1548 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1549 size_t Start = 0, Next = Mask.find('_');
1550 StringRef Flags = "";
1551 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1552 if (Next != StringRef::npos)
1553 Flags = Mask.slice(Next+1, Mask.size());
1555 // FlagsVal contains the complete mask:
1557 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1558 unsigned FlagsVal = 0;
1560 if (SpecReg == "apsr") {
1561 FlagsVal = StringSwitch<unsigned>(Flags)
1562 .Case("nzcvq", 0x8) // same as CPSR_f
1563 .Case("g", 0x4) // same as CPSR_s
1564 .Case("nzcvqg", 0xc) // same as CPSR_fs
1567 if (FlagsVal == ~0U) {
1569 return MatchOperand_NoMatch;
1571 FlagsVal = 0; // No flag
1573 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1574 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1576 for (int i = 0, e = Flags.size(); i != e; ++i) {
1577 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1584 // If some specific flag is already set, it means that some letter is
1585 // present more than once, this is not acceptable.
1586 if (FlagsVal == ~0U || (FlagsVal & Flag))
1587 return MatchOperand_NoMatch;
1590 } else // No match for special register.
1591 return MatchOperand_NoMatch;
1593 // Special register without flags are equivalent to "fc" flags.
1597 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1598 if (SpecReg == "spsr")
1601 Parser.Lex(); // Eat identifier token.
1602 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1603 return MatchOperand_Success;
1606 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1607 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1608 int Low, int High) {
1609 const AsmToken &Tok = Parser.getTok();
1610 if (Tok.isNot(AsmToken::Identifier)) {
1611 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1612 return MatchOperand_ParseFail;
1614 StringRef ShiftName = Tok.getString();
1615 std::string LowerOp = LowercaseString(Op);
1616 std::string UpperOp = UppercaseString(Op);
1617 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1618 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1619 return MatchOperand_ParseFail;
1621 Parser.Lex(); // Eat shift type token.
1623 // There must be a '#' and a shift amount.
1624 if (Parser.getTok().isNot(AsmToken::Hash)) {
1625 Error(Parser.getTok().getLoc(), "'#' expected");
1626 return MatchOperand_ParseFail;
1628 Parser.Lex(); // Eat hash token.
1630 const MCExpr *ShiftAmount;
1631 SMLoc Loc = Parser.getTok().getLoc();
1632 if (getParser().ParseExpression(ShiftAmount)) {
1633 Error(Loc, "illegal expression");
1634 return MatchOperand_ParseFail;
1636 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1638 Error(Loc, "constant expression expected");
1639 return MatchOperand_ParseFail;
1641 int Val = CE->getValue();
1642 if (Val < Low || Val > High) {
1643 Error(Loc, "immediate value out of range");
1644 return MatchOperand_ParseFail;
1647 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1649 return MatchOperand_Success;
1652 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1653 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1654 const AsmToken &Tok = Parser.getTok();
1655 SMLoc S = Tok.getLoc();
1656 if (Tok.isNot(AsmToken::Identifier)) {
1657 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1658 return MatchOperand_ParseFail;
1660 int Val = StringSwitch<int>(Tok.getString())
1664 Parser.Lex(); // Eat the token.
1667 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1668 return MatchOperand_ParseFail;
1670 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1672 S, Parser.getTok().getLoc()));
1673 return MatchOperand_Success;
1676 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1677 /// instructions. Legal values are:
1678 /// lsl #n 'n' in [0,31]
1679 /// asr #n 'n' in [1,32]
1680 /// n == 32 encoded as n == 0.
1681 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1682 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1683 const AsmToken &Tok = Parser.getTok();
1684 SMLoc S = Tok.getLoc();
1685 if (Tok.isNot(AsmToken::Identifier)) {
1686 Error(S, "shift operator 'asr' or 'lsl' expected");
1687 return MatchOperand_ParseFail;
1689 StringRef ShiftName = Tok.getString();
1691 if (ShiftName == "lsl" || ShiftName == "LSL")
1693 else if (ShiftName == "asr" || ShiftName == "ASR")
1696 Error(S, "shift operator 'asr' or 'lsl' expected");
1697 return MatchOperand_ParseFail;
1699 Parser.Lex(); // Eat the operator.
1701 // A '#' and a shift amount.
1702 if (Parser.getTok().isNot(AsmToken::Hash)) {
1703 Error(Parser.getTok().getLoc(), "'#' expected");
1704 return MatchOperand_ParseFail;
1706 Parser.Lex(); // Eat hash token.
1708 const MCExpr *ShiftAmount;
1709 SMLoc E = Parser.getTok().getLoc();
1710 if (getParser().ParseExpression(ShiftAmount)) {
1711 Error(E, "malformed shift expression");
1712 return MatchOperand_ParseFail;
1714 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1716 Error(E, "shift amount must be an immediate");
1717 return MatchOperand_ParseFail;
1720 int64_t Val = CE->getValue();
1722 // Shift amount must be in [1,32]
1723 if (Val < 1 || Val > 32) {
1724 Error(E, "'asr' shift amount must be in range [1,32]");
1725 return MatchOperand_ParseFail;
1727 // asr #32 encoded as asr #0.
1728 if (Val == 32) Val = 0;
1730 // Shift amount must be in [1,32]
1731 if (Val < 0 || Val > 31) {
1732 Error(E, "'lsr' shift amount must be in range [0,31]");
1733 return MatchOperand_ParseFail;
1737 E = Parser.getTok().getLoc();
1738 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1740 return MatchOperand_Success;
1743 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1744 /// of instructions. Legal values are:
1745 /// ror #n 'n' in {0, 8, 16, 24}
1746 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1747 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1748 const AsmToken &Tok = Parser.getTok();
1749 SMLoc S = Tok.getLoc();
1750 if (Tok.isNot(AsmToken::Identifier)) {
1751 Error(S, "rotate operator 'ror' expected");
1752 return MatchOperand_ParseFail;
1754 StringRef ShiftName = Tok.getString();
1755 if (ShiftName != "ror" && ShiftName != "ROR") {
1756 Error(S, "rotate operator 'ror' expected");
1757 return MatchOperand_ParseFail;
1759 Parser.Lex(); // Eat the operator.
1761 // A '#' and a rotate amount.
1762 if (Parser.getTok().isNot(AsmToken::Hash)) {
1763 Error(Parser.getTok().getLoc(), "'#' expected");
1764 return MatchOperand_ParseFail;
1766 Parser.Lex(); // Eat hash token.
1768 const MCExpr *ShiftAmount;
1769 SMLoc E = Parser.getTok().getLoc();
1770 if (getParser().ParseExpression(ShiftAmount)) {
1771 Error(E, "malformed rotate expression");
1772 return MatchOperand_ParseFail;
1774 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1776 Error(E, "rotate amount must be an immediate");
1777 return MatchOperand_ParseFail;
1780 int64_t Val = CE->getValue();
1781 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1782 // normally, zero is represented in asm by omitting the rotate operand
1784 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1785 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1786 return MatchOperand_ParseFail;
1789 E = Parser.getTok().getLoc();
1790 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1792 return MatchOperand_Success;
1795 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1796 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1797 SMLoc S = Parser.getTok().getLoc();
1798 // The bitfield descriptor is really two operands, the LSB and the width.
1799 if (Parser.getTok().isNot(AsmToken::Hash)) {
1800 Error(Parser.getTok().getLoc(), "'#' expected");
1801 return MatchOperand_ParseFail;
1803 Parser.Lex(); // Eat hash token.
1805 const MCExpr *LSBExpr;
1806 SMLoc E = Parser.getTok().getLoc();
1807 if (getParser().ParseExpression(LSBExpr)) {
1808 Error(E, "malformed immediate expression");
1809 return MatchOperand_ParseFail;
1811 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1813 Error(E, "'lsb' operand must be an immediate");
1814 return MatchOperand_ParseFail;
1817 int64_t LSB = CE->getValue();
1818 // The LSB must be in the range [0,31]
1819 if (LSB < 0 || LSB > 31) {
1820 Error(E, "'lsb' operand must be in the range [0,31]");
1821 return MatchOperand_ParseFail;
1823 E = Parser.getTok().getLoc();
1825 // Expect another immediate operand.
1826 if (Parser.getTok().isNot(AsmToken::Comma)) {
1827 Error(Parser.getTok().getLoc(), "too few operands");
1828 return MatchOperand_ParseFail;
1830 Parser.Lex(); // Eat hash token.
1831 if (Parser.getTok().isNot(AsmToken::Hash)) {
1832 Error(Parser.getTok().getLoc(), "'#' expected");
1833 return MatchOperand_ParseFail;
1835 Parser.Lex(); // Eat hash token.
1837 const MCExpr *WidthExpr;
1838 if (getParser().ParseExpression(WidthExpr)) {
1839 Error(E, "malformed immediate expression");
1840 return MatchOperand_ParseFail;
1842 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1844 Error(E, "'width' operand must be an immediate");
1845 return MatchOperand_ParseFail;
1848 int64_t Width = CE->getValue();
1849 // The LSB must be in the range [1,32-lsb]
1850 if (Width < 1 || Width > 32 - LSB) {
1851 Error(E, "'width' operand must be in the range [1,32-lsb]");
1852 return MatchOperand_ParseFail;
1854 E = Parser.getTok().getLoc();
1856 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1858 return MatchOperand_Success;
1861 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1862 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1863 // Check for a post-index addressing register operand. Specifically:
1864 // postidx_reg := '+' register
1868 // This method must return MatchOperand_NoMatch without consuming any tokens
1869 // in the case where there is no match, as other alternatives take other
1871 AsmToken Tok = Parser.getTok();
1872 SMLoc S = Tok.getLoc();
1873 bool haveEaten = false;
1876 if (Tok.is(AsmToken::Plus)) {
1877 Parser.Lex(); // Eat the '+' token.
1879 } else if (Tok.is(AsmToken::Minus)) {
1880 Parser.Lex(); // Eat the '-' token.
1884 if (Parser.getTok().is(AsmToken::Identifier))
1885 Reg = tryParseRegister();
1888 return MatchOperand_NoMatch;
1889 Error(Parser.getTok().getLoc(), "register expected");
1890 return MatchOperand_ParseFail;
1892 SMLoc E = Parser.getTok().getLoc();
1894 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, S, E));
1896 return MatchOperand_Success;
1899 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1900 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1901 /// when they refer multiple MIOperands inside a single one.
1903 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1904 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1905 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1907 // Create a writeback register dummy placeholder.
1908 Inst.addOperand(MCOperand::CreateImm(0));
1910 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
1911 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1915 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1916 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1917 /// when they refer multiple MIOperands inside a single one.
1919 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1920 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1921 // Create a writeback register dummy placeholder.
1922 Inst.addOperand(MCOperand::CreateImm(0));
1923 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
1927 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
1928 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1929 /// when they refer multiple MIOperands inside a single one.
1931 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
1932 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1934 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1935 // Create a writeback register dummy placeholder.
1936 Inst.addOperand(MCOperand::CreateImm(0));
1938 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1940 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
1942 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1946 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
1947 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1948 /// when they refer multiple MIOperands inside a single one.
1950 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
1951 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1953 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1954 // Create a writeback register dummy placeholder.
1955 Inst.addOperand(MCOperand::CreateImm(0));
1957 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1959 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
1961 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1965 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
1966 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1967 /// when they refer multiple MIOperands inside a single one.
1969 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
1970 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1971 // Create a writeback register dummy placeholder.
1972 Inst.addOperand(MCOperand::CreateImm(0));
1974 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1976 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1978 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
1980 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1984 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
1985 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1986 /// when they refer multiple MIOperands inside a single one.
1988 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
1989 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1990 // Create a writeback register dummy placeholder.
1991 Inst.addOperand(MCOperand::CreateImm(0));
1993 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1995 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1997 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
1999 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2003 /// Parse an ARM memory expression, return false if successful else return true
2004 /// or an error. The first token must be a '[' when called.
2006 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2008 assert(Parser.getTok().is(AsmToken::LBrac) &&
2009 "Token is not a Left Bracket");
2010 S = Parser.getTok().getLoc();
2011 Parser.Lex(); // Eat left bracket token.
2013 const AsmToken &BaseRegTok = Parser.getTok();
2014 int BaseRegNum = tryParseRegister();
2015 if (BaseRegNum == -1)
2016 return Error(BaseRegTok.getLoc(), "register expected");
2018 // The next token must either be a comma or a closing bracket.
2019 const AsmToken &Tok = Parser.getTok();
2020 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2021 return Error(Tok.getLoc(), "malformed memory operand");
2023 if (Tok.is(AsmToken::RBrac)) {
2025 Parser.Lex(); // Eat right bracket token.
2027 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2033 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2034 Parser.Lex(); // Eat the comma.
2036 // If we have a '#' it's an immediate offset, else assume it's a register
2038 if (Parser.getTok().is(AsmToken::Hash)) {
2039 Parser.Lex(); // Eat the '#'.
2040 E = Parser.getTok().getLoc();
2042 // FIXME: Special case #-0 so we can correctly set the U bit.
2044 const MCExpr *Offset;
2045 if (getParser().ParseExpression(Offset))
2048 // The expression has to be a constant. Memory references with relocations
2049 // don't come through here, as they use the <label> forms of the relevant
2051 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2053 return Error (E, "constant expression expected");
2055 // Now we should have the closing ']'
2056 E = Parser.getTok().getLoc();
2057 if (Parser.getTok().isNot(AsmToken::RBrac))
2058 return Error(E, "']' expected");
2059 Parser.Lex(); // Eat right bracket token.
2061 // Don't worry about range checking the value here. That's handled by
2062 // the is*() predicates.
2063 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2064 ARM_AM::no_shift, 0, false, S,E));
2066 // If there's a pre-indexing writeback marker, '!', just add it as a token
2068 if (Parser.getTok().is(AsmToken::Exclaim)) {
2069 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2070 Parser.Lex(); // Eat the '!'.
2076 // The register offset is optionally preceded by a '+' or '-'
2077 bool isNegative = false;
2078 if (Parser.getTok().is(AsmToken::Minus)) {
2080 Parser.Lex(); // Eat the '-'.
2081 } else if (Parser.getTok().is(AsmToken::Plus)) {
2083 Parser.Lex(); // Eat the '+'.
2086 E = Parser.getTok().getLoc();
2087 int OffsetRegNum = tryParseRegister();
2088 if (OffsetRegNum == -1)
2089 return Error(E, "register expected");
2091 // If there's a shift operator, handle it.
2092 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2093 unsigned ShiftValue = 0;
2094 if (Parser.getTok().is(AsmToken::Comma)) {
2095 Parser.Lex(); // Eat the ','.
2096 if (parseMemRegOffsetShift(ShiftType, ShiftValue))
2100 // Now we should have the closing ']'
2101 E = Parser.getTok().getLoc();
2102 if (Parser.getTok().isNot(AsmToken::RBrac))
2103 return Error(E, "']' expected");
2104 Parser.Lex(); // Eat right bracket token.
2106 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2107 ShiftType, ShiftValue, isNegative,
2115 /// parseMemRegOffsetShift - one of these two:
2116 /// ( lsl | lsr | asr | ror ) , # shift_amount
2118 /// return true if it parses a shift otherwise it returns false.
2119 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2121 SMLoc Loc = Parser.getTok().getLoc();
2122 const AsmToken &Tok = Parser.getTok();
2123 if (Tok.isNot(AsmToken::Identifier))
2125 StringRef ShiftName = Tok.getString();
2126 if (ShiftName == "lsl" || ShiftName == "LSL")
2128 else if (ShiftName == "lsr" || ShiftName == "LSR")
2130 else if (ShiftName == "asr" || ShiftName == "ASR")
2132 else if (ShiftName == "ror" || ShiftName == "ROR")
2134 else if (ShiftName == "rrx" || ShiftName == "RRX")
2137 return Error(Loc, "illegal shift operator");
2138 Parser.Lex(); // Eat shift type token.
2140 // rrx stands alone.
2142 if (St != ARM_AM::rrx) {
2143 Loc = Parser.getTok().getLoc();
2144 // A '#' and a shift amount.
2145 const AsmToken &HashTok = Parser.getTok();
2146 if (HashTok.isNot(AsmToken::Hash))
2147 return Error(HashTok.getLoc(), "'#' expected");
2148 Parser.Lex(); // Eat hash token.
2151 if (getParser().ParseExpression(Expr))
2153 // Range check the immediate.
2154 // lsl, ror: 0 <= imm <= 31
2155 // lsr, asr: 0 <= imm <= 32
2156 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2158 return Error(Loc, "shift amount must be an immediate");
2159 int64_t Imm = CE->getValue();
2161 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2162 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2163 return Error(Loc, "immediate shift value out of range");
2170 /// Parse a arm instruction operand. For now this parses the operand regardless
2171 /// of the mnemonic.
2172 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2173 StringRef Mnemonic) {
2176 // Check if the current operand has a custom associated parser, if so, try to
2177 // custom parse the operand, or fallback to the general approach.
2178 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2179 if (ResTy == MatchOperand_Success)
2181 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2182 // there was a match, but an error occurred, in which case, just return that
2183 // the operand parsing failed.
2184 if (ResTy == MatchOperand_ParseFail)
2187 switch (getLexer().getKind()) {
2189 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2191 case AsmToken::Identifier: {
2192 if (!tryParseRegisterWithWriteBack(Operands))
2194 int Res = tryParseShiftRegister(Operands);
2195 if (Res == 0) // success
2197 else if (Res == -1) // irrecoverable error
2200 // Fall though for the Identifier case that is not a register or a
2203 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2204 case AsmToken::Dot: { // . as a branch target
2205 // This was not a register so parse other operands that start with an
2206 // identifier (like labels) as expressions and create them as immediates.
2207 const MCExpr *IdVal;
2208 S = Parser.getTok().getLoc();
2209 if (getParser().ParseExpression(IdVal))
2211 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2212 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2215 case AsmToken::LBrac:
2216 return parseMemory(Operands);
2217 case AsmToken::LCurly:
2218 return parseRegisterList(Operands);
2219 case AsmToken::Hash:
2220 // #42 -> immediate.
2221 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2222 S = Parser.getTok().getLoc();
2224 const MCExpr *ImmVal;
2225 if (getParser().ParseExpression(ImmVal))
2227 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2228 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2230 case AsmToken::Colon: {
2231 // ":lower16:" and ":upper16:" expression prefixes
2232 // FIXME: Check it's an expression prefix,
2233 // e.g. (FOO - :lower16:BAR) isn't legal.
2234 ARMMCExpr::VariantKind RefKind;
2235 if (parsePrefix(RefKind))
2238 const MCExpr *SubExprVal;
2239 if (getParser().ParseExpression(SubExprVal))
2242 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2244 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2245 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2251 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2252 // :lower16: and :upper16:.
2253 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2254 RefKind = ARMMCExpr::VK_ARM_None;
2256 // :lower16: and :upper16: modifiers
2257 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2258 Parser.Lex(); // Eat ':'
2260 if (getLexer().isNot(AsmToken::Identifier)) {
2261 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2265 StringRef IDVal = Parser.getTok().getIdentifier();
2266 if (IDVal == "lower16") {
2267 RefKind = ARMMCExpr::VK_ARM_LO16;
2268 } else if (IDVal == "upper16") {
2269 RefKind = ARMMCExpr::VK_ARM_HI16;
2271 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2276 if (getLexer().isNot(AsmToken::Colon)) {
2277 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2280 Parser.Lex(); // Eat the last ':'
2285 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2286 MCSymbolRefExpr::VariantKind Variant) {
2287 // Recurse over the given expression, rebuilding it to apply the given variant
2288 // to the leftmost symbol.
2289 if (Variant == MCSymbolRefExpr::VK_None)
2292 switch (E->getKind()) {
2293 case MCExpr::Target:
2294 llvm_unreachable("Can't handle target expr yet");
2295 case MCExpr::Constant:
2296 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2298 case MCExpr::SymbolRef: {
2299 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2301 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2304 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2308 llvm_unreachable("Can't handle unary expressions yet");
2310 case MCExpr::Binary: {
2311 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2312 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2313 const MCExpr *RHS = BE->getRHS();
2317 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2321 assert(0 && "Invalid expression kind!");
2325 /// \brief Given a mnemonic, split out possible predication code and carry
2326 /// setting letters to form a canonical mnemonic and flags.
2328 // FIXME: Would be nice to autogen this.
2329 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2330 unsigned &PredicationCode,
2332 unsigned &ProcessorIMod) {
2333 PredicationCode = ARMCC::AL;
2334 CarrySetting = false;
2337 // Ignore some mnemonics we know aren't predicated forms.
2339 // FIXME: Would be nice to autogen this.
2340 if ((Mnemonic == "movs" && isThumb()) ||
2341 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2342 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2343 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2344 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2345 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2346 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2347 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2350 // First, split out any predication code. Ignore mnemonics we know aren't
2351 // predicated but do have a carry-set and so weren't caught above.
2352 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2353 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2354 Mnemonic != "umlals" && Mnemonic != "umulls") {
2355 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2356 .Case("eq", ARMCC::EQ)
2357 .Case("ne", ARMCC::NE)
2358 .Case("hs", ARMCC::HS)
2359 .Case("cs", ARMCC::HS)
2360 .Case("lo", ARMCC::LO)
2361 .Case("cc", ARMCC::LO)
2362 .Case("mi", ARMCC::MI)
2363 .Case("pl", ARMCC::PL)
2364 .Case("vs", ARMCC::VS)
2365 .Case("vc", ARMCC::VC)
2366 .Case("hi", ARMCC::HI)
2367 .Case("ls", ARMCC::LS)
2368 .Case("ge", ARMCC::GE)
2369 .Case("lt", ARMCC::LT)
2370 .Case("gt", ARMCC::GT)
2371 .Case("le", ARMCC::LE)
2372 .Case("al", ARMCC::AL)
2375 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2376 PredicationCode = CC;
2380 // Next, determine if we have a carry setting bit. We explicitly ignore all
2381 // the instructions we know end in 's'.
2382 if (Mnemonic.endswith("s") &&
2383 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2384 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2385 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2386 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2387 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2388 (Mnemonic == "movs" && isThumb()))) {
2389 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2390 CarrySetting = true;
2393 // The "cps" instruction can have a interrupt mode operand which is glued into
2394 // the mnemonic. Check if this is the case, split it and parse the imod op
2395 if (Mnemonic.startswith("cps")) {
2396 // Split out any imod code.
2398 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2399 .Case("ie", ARM_PROC::IE)
2400 .Case("id", ARM_PROC::ID)
2403 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2404 ProcessorIMod = IMod;
2411 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2412 /// inclusion of carry set or predication code operands.
2414 // FIXME: It would be nice to autogen this.
2416 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2417 bool &CanAcceptPredicationCode) {
2418 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2419 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2420 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2421 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2422 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2423 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2424 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2425 Mnemonic == "eor" || Mnemonic == "smlal" ||
2426 (Mnemonic == "mov" && !isThumbOne())) {
2427 CanAcceptCarrySet = true;
2429 CanAcceptCarrySet = false;
2432 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2433 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2434 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2435 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2436 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2437 Mnemonic == "setend" ||
2438 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2439 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2441 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2442 CanAcceptPredicationCode = false;
2444 CanAcceptPredicationCode = true;
2448 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2449 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2450 CanAcceptPredicationCode = false;
2453 /// Parse an arm instruction mnemonic followed by its operands.
2454 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2455 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2456 // Create the leading tokens for the mnemonic, split by '.' characters.
2457 size_t Start = 0, Next = Name.find('.');
2458 StringRef Mnemonic = Name.slice(Start, Next);
2460 // Split out the predication code and carry setting flag from the mnemonic.
2461 unsigned PredicationCode;
2462 unsigned ProcessorIMod;
2464 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2467 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2469 // FIXME: This is all a pretty gross hack. We should automatically handle
2470 // optional operands like this via tblgen.
2472 // Next, add the CCOut and ConditionCode operands, if needed.
2474 // For mnemonics which can ever incorporate a carry setting bit or predication
2475 // code, our matching model involves us always generating CCOut and
2476 // ConditionCode operands to match the mnemonic "as written" and then we let
2477 // the matcher deal with finding the right instruction or generating an
2478 // appropriate error.
2479 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2480 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2482 // If we had a carry-set on an instruction that can't do that, issue an
2484 if (!CanAcceptCarrySet && CarrySetting) {
2485 Parser.EatToEndOfStatement();
2486 return Error(NameLoc, "instruction '" + Mnemonic +
2487 "' can not set flags, but 's' suffix specified");
2489 // If we had a predication code on an instruction that can't do that, issue an
2491 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2492 Parser.EatToEndOfStatement();
2493 return Error(NameLoc, "instruction '" + Mnemonic +
2494 "' is not predicable, but condition code specified");
2497 // Add the carry setting operand, if necessary.
2499 // FIXME: It would be awesome if we could somehow invent a location such that
2500 // match errors on this operand would print a nice diagnostic about how the
2501 // 's' character in the mnemonic resulted in a CCOut operand.
2502 if (CanAcceptCarrySet)
2503 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2506 // Add the predication code operand, if necessary.
2507 if (CanAcceptPredicationCode) {
2508 Operands.push_back(ARMOperand::CreateCondCode(
2509 ARMCC::CondCodes(PredicationCode), NameLoc));
2512 // Add the processor imod operand, if necessary.
2513 if (ProcessorIMod) {
2514 Operands.push_back(ARMOperand::CreateImm(
2515 MCConstantExpr::Create(ProcessorIMod, getContext()),
2518 // This mnemonic can't ever accept a imod, but the user wrote
2519 // one (or misspelled another mnemonic).
2521 // FIXME: Issue a nice error.
2524 // Add the remaining tokens in the mnemonic.
2525 while (Next != StringRef::npos) {
2527 Next = Name.find('.', Start + 1);
2528 StringRef ExtraToken = Name.slice(Start, Next);
2530 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2533 // Read the remaining operands.
2534 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2535 // Read the first operand.
2536 if (parseOperand(Operands, Mnemonic)) {
2537 Parser.EatToEndOfStatement();
2541 while (getLexer().is(AsmToken::Comma)) {
2542 Parser.Lex(); // Eat the comma.
2544 // Parse and remember the operand.
2545 if (parseOperand(Operands, Mnemonic)) {
2546 Parser.EatToEndOfStatement();
2552 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2553 Parser.EatToEndOfStatement();
2554 return TokError("unexpected token in argument list");
2557 Parser.Lex(); // Consume the EndOfStatement
2560 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2561 // another does not. Specifically, the MOVW instruction does not. So we
2562 // special case it here and remove the defaulted (non-setting) cc_out
2563 // operand if that's the instruction we're trying to match.
2565 // We do this post-processing of the explicit operands rather than just
2566 // conditionally adding the cc_out in the first place because we need
2567 // to check the type of the parsed immediate operand.
2568 if (Mnemonic == "mov" && Operands.size() > 4 &&
2569 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2570 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2571 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2572 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2573 Operands.erase(Operands.begin() + 1);
2577 // ARM mode 'blx' need special handling, as the register operand version
2578 // is predicable, but the label operand version is not. So, we can't rely
2579 // on the Mnemonic based checking to correctly figure out when to put
2580 // a CondCode operand in the list. If we're trying to match the label
2581 // version, remove the CondCode operand here.
2582 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2583 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2584 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2585 Operands.erase(Operands.begin() + 1);
2591 // Validate context-sensitive operand constraints.
2592 // FIXME: We would really like to be able to tablegen'erate this.
2594 validateInstruction(MCInst &Inst,
2595 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2596 switch (Inst.getOpcode()) {
2598 // Rt2 must be Rt + 1.
2599 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2600 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2602 return Error(Operands[3]->getStartLoc(),
2603 "destination operands must be sequential");
2607 // Rt2 must be Rt + 1.
2608 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2609 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2611 return Error(Operands[4]->getStartLoc(),
2612 "source operands must be sequential");
2617 // width must be in range [1, 32-lsb]
2618 unsigned lsb = Inst.getOperand(2).getImm();
2619 unsigned widthm1 = Inst.getOperand(3).getImm();
2620 if (widthm1 >= 32 - lsb)
2621 return Error(Operands[5]->getStartLoc(),
2622 "bitfield width must be in range [1,32-lsb]");
2630 MatchAndEmitInstruction(SMLoc IDLoc,
2631 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2635 MatchResultTy MatchResult;
2636 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2637 switch (MatchResult) {
2639 // Context sensitive operand constraints aren't handled by the matcher,
2640 // so check them here.
2641 if (validateInstruction(Inst, Operands))
2644 Out.EmitInstruction(Inst);
2646 case Match_MissingFeature:
2647 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2649 case Match_InvalidOperand: {
2650 SMLoc ErrorLoc = IDLoc;
2651 if (ErrorInfo != ~0U) {
2652 if (ErrorInfo >= Operands.size())
2653 return Error(IDLoc, "too few operands for instruction");
2655 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2656 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2659 return Error(ErrorLoc, "invalid operand for instruction");
2661 case Match_MnemonicFail:
2662 return Error(IDLoc, "unrecognized instruction mnemonic");
2663 case Match_ConversionFail:
2664 return Error(IDLoc, "unable to convert operands to instruction");
2667 llvm_unreachable("Implement any new match types added!");
2671 /// parseDirective parses the arm specific directives
2672 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2673 StringRef IDVal = DirectiveID.getIdentifier();
2674 if (IDVal == ".word")
2675 return parseDirectiveWord(4, DirectiveID.getLoc());
2676 else if (IDVal == ".thumb")
2677 return parseDirectiveThumb(DirectiveID.getLoc());
2678 else if (IDVal == ".thumb_func")
2679 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2680 else if (IDVal == ".code")
2681 return parseDirectiveCode(DirectiveID.getLoc());
2682 else if (IDVal == ".syntax")
2683 return parseDirectiveSyntax(DirectiveID.getLoc());
2687 /// parseDirectiveWord
2688 /// ::= .word [ expression (, expression)* ]
2689 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2690 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2692 const MCExpr *Value;
2693 if (getParser().ParseExpression(Value))
2696 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2698 if (getLexer().is(AsmToken::EndOfStatement))
2701 // FIXME: Improve diagnostic.
2702 if (getLexer().isNot(AsmToken::Comma))
2703 return Error(L, "unexpected token in directive");
2712 /// parseDirectiveThumb
2714 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2715 if (getLexer().isNot(AsmToken::EndOfStatement))
2716 return Error(L, "unexpected token in directive");
2719 // TODO: set thumb mode
2720 // TODO: tell the MC streamer the mode
2721 // getParser().getStreamer().Emit???();
2725 /// parseDirectiveThumbFunc
2726 /// ::= .thumbfunc symbol_name
2727 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2728 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2729 bool isMachO = MAI.hasSubsectionsViaSymbols();
2732 // Darwin asm has function name after .thumb_func direction
2735 const AsmToken &Tok = Parser.getTok();
2736 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2737 return Error(L, "unexpected token in .thumb_func directive");
2738 Name = Tok.getString();
2739 Parser.Lex(); // Consume the identifier token.
2742 if (getLexer().isNot(AsmToken::EndOfStatement))
2743 return Error(L, "unexpected token in directive");
2746 // FIXME: assuming function name will be the line following .thumb_func
2748 Name = Parser.getTok().getString();
2751 // Mark symbol as a thumb symbol.
2752 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2753 getParser().getStreamer().EmitThumbFunc(Func);
2757 /// parseDirectiveSyntax
2758 /// ::= .syntax unified | divided
2759 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2760 const AsmToken &Tok = Parser.getTok();
2761 if (Tok.isNot(AsmToken::Identifier))
2762 return Error(L, "unexpected token in .syntax directive");
2763 StringRef Mode = Tok.getString();
2764 if (Mode == "unified" || Mode == "UNIFIED")
2766 else if (Mode == "divided" || Mode == "DIVIDED")
2767 return Error(L, "'.syntax divided' arm asssembly not supported");
2769 return Error(L, "unrecognized syntax mode in .syntax directive");
2771 if (getLexer().isNot(AsmToken::EndOfStatement))
2772 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2775 // TODO tell the MC streamer the mode
2776 // getParser().getStreamer().Emit???();
2780 /// parseDirectiveCode
2781 /// ::= .code 16 | 32
2782 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
2783 const AsmToken &Tok = Parser.getTok();
2784 if (Tok.isNot(AsmToken::Integer))
2785 return Error(L, "unexpected token in .code directive");
2786 int64_t Val = Parser.getTok().getIntVal();
2792 return Error(L, "invalid operand to .code directive");
2794 if (getLexer().isNot(AsmToken::EndOfStatement))
2795 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2801 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2806 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2813 extern "C" void LLVMInitializeARMAsmLexer();
2815 /// Force static initialization.
2816 extern "C" void LLVMInitializeARMAsmParser() {
2817 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
2818 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
2819 LLVMInitializeARMAsmLexer();
2822 #define GET_REGISTER_MATCHER
2823 #define GET_MATCHER_IMPLEMENTATION
2824 #include "ARMGenAsmMatcher.inc"